Ski



FIG. 1 is a top plan view of a ski showing my new design;

FIG. 2 is a side elevational view thereof, the side opposite being substantially a mirror image;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a front elevational view thereof; and

FIG. 5 is a rear elevational view thereof.

Portions of FIG. 1 are lined to indicate color contrast only. 

The ornamental design for a ski, substantially as shown and described. 